Update resources/less/metager/general/base.less, resources/less/metager/general/general.less, resources/less/metager/metager.less, resources/less/metager/metager-dark.less files

Update resources/less/metager/metager-dark.less, resources/less/metager/variables-dark.less, webpack.mix.js, resources/views/layouts/staticPages.blade.php files

Master

See merge request !1504

Resolve "Use Mariadb as Cache Backend"

Closes #931

See merge request !1505

Development

See merge request !1503

Development

See merge request !1502